Metal plug for pipe joints



Sept. 4, 1928. 1,682,741

E. R. BEARING METAL PLUG FOR PIPEJOINTS Filed Dec. 27, 1927 5 W; ,K Wag;

21 f 2622 If 7 M Z0 lmienlor A ttomcy Patented Sept. t, 1928.

EDMUND R. nn inrne, or

BIRMINGHAM, ,"ALAIBAMA.

METAL PLUG FOR PIPE JOINTS.

Application filed December 27,1927. seriainc. 242,820.

lily invention relates to improvements in metal pipe plugs torbell and spigot ends of pipe and pipe fittings as used for conveying water or gas under high pressure. The joints in the ends of such pipe and fittings for which this plug is intended are made with jute yarn and lead which is poured. calked or driven down in the bell around the wall of the pipe, making. a pressure tight joint.

One of the objects of my inventionis to provide a plug of the character designated which shall be simple of design and easy of manufacture, capable of withstanding relatively high pressure and which may be read ily applied and removed from a pipe end without necessity of melting the lead from around the joint. 1 y A further object of my invention is to p r0 vide a plug of the character designated which may be readily applied and removed and in which the parts are protected from corrosion and earth packing when left in the ground for longperiods of time, whereby the plug 2 may be readily removed from the end of the pipe.

The improvements in the plug covered by this invention, compared to the type now commonly used, are that, although the new plug inay have what is known to the trade as a beaded end, the lead and jute can be removed from around the plug in the bell without the aid of heat, as hereafter ex 1 plained, and in a fraction of the time now re 5 quired.

Apparatus embodying features of my invention is illustrated in the accompanying drawing, forming a part of this application, wherein. p I Fig. 1 is a sectional view through the bell end of a pipe and showing my improved plug in position; r y, r

Fig. 2 is a view similar to Fig. 1 and showing the plug being removed, and

Fig. 3 is a sectional view taken along the line IIIIII of Fig. 1.

Referring now to the drawing I show. a iragm nt of a pipe 5 having a bell end 6,; termii ng at its inner end in. an annular shoulder s and closed to resist high internal.

drawing, is

In the lower side of the disk.

plug bolts 23 to keep the pressure by means of my impoved plug; Toward the outer endo'lthe bell, as is usual, is

an annular groove 7 whiclrservesvto hold thepackingiin place which is used in connecting pipe sections and, as will appear later, to hold the packing employed with myim proved plug. The plug. comprises a plate p or disk 12 resting on the annular shoulder 9 forming the bottom of the hell 6. The disk 12 alsojserves as a support to jack against when removing the plugras will be described later. Above the plate 12, as seen in the i a disk or plate 13 enclosed by a cylindrical wall member 14,:the disk 13 and plate 12 being joined, when assembled, by a machine bolt 15 and a nut 16 on the lower endofthe bolt. The nut 16 for the b0lt15 is held in place in a recess 17 formed .on the lower side of the plate. 12. The sides otthe recess 17 are tapered at 18 to allow a lead plug 19 tobec-alked in placeforming a water or gas tight joint to prevent rusting; ofthe nut 16 and also toprevent leakage thereby.

The disk 12 is formed with a head 20. larger in diameter than the cylindrical wall 14 of the disk 13 andwhich, when the plug is in place and properly packed cooperates. with the packing in the; annular groove 7 to form ie an interlock which renders the plug capable of withstanding high intcrnzilpres sure in the pipe 5. i 1 i 13 are a plu rality of recesses 21, only two being shown and the number depending upon the diameter of the plug. Positioned within the re cesscs 21 arelnuts 22, d nuts being made of normally receiving threadsin the nuts, clean. The heads otthe bolts 23 are. pro tected against corrosion and against earth filling between them and causing obstruction to the use of a wrench thereon, by a cover 24 which is held in place by the bolt 15...Between the plate 12 andthe cylindrical wallllt is a lead gasket 26 making a fluid tight joint. F As a further protection against leakage, lead washers 27 and 28 are used under the heads of the bolts 23 and 15 respectively.

, The plug, assembled asshown inlFig. 1,

usually applied to the end a pipe in the non-corrosive metal and member and disk member, a transverse Wall the transverse Wall to the disk member, packextencling aorossthe cylindrical member and ing means cooperating with the bolt to prehaving a plurality of openings therein carryvent leakage, and a cover for the plug and i9 ing threaded members for co-operating with held in place by thebolt.

5 forcing screws in removing the cylindrical V In testimony whereof I, EDMUND R. DEAR- member, means normally closing the open ING, afiix my signature. ings against leakage, a bolt normally joining EDMUND R. BEARING. 

